In an adiabatic process, no transfer of heat takes place between system and surroundings. Choose the correct option for free expansion of an ideal gas under adiabatic condition from the following.
A.△q=0, △T≠0, w=0
B.△q≠0, △T=0, w=0
C.△q=0, △T=0, w=0
D.△q=0, △T<0, w≠0